Lamington Blue Spiny Crayfish (Euastacus sulcatus, Parastacidae)
This Gondwanan genus of 'spiny cray' is endemic to Eastern Australia. They are slow-growing, live in underground burrows near clean, clear mountain streams, breed once-a-year, produce few eggs, and are very long-lived. You can often see this species day and night along walking tracks. Normally slow moving this species is capable of extremely fast, explosively aggressive action, hissing all the while if provoked or catching prey. They are fearless. Flight or fight behaviour is characteristic.